#include "newfield.h"

#include <unistd.h>

#include "fmt.h"
#include "stralloc.h"

#include "date822fmt.h"
#include "datetime.h"

/* "Date: 26 Sep 1995 04:46:53 -0000\n" */
stralloc newfield_date = {0};
/* "Message-ID: <19950926044653.12345.qmail@silverton.berkeley.edu>\n" */
stralloc newfield_msgid = {0};

static unsigned int datefmt(char *s, datetime_sec when)
{
  unsigned int i;
  unsigned int len;
  struct datetime dt;
  datetime_tai(&dt, when);
  len = 0;
  i = fmt_str(s, "Date: ");
  len += i;
  if (s) s += i;
  i = date822fmt(s, &dt);
  len += i;
  if (s) s += i;
  return len;
}

static unsigned int msgidfmt(char *s, char *idhost, int idhostlen, datetime_sec when)
{
  unsigned int i;
  unsigned int len;
  struct datetime dt;
  datetime_tai(&dt, when);
  len = 0;
  i = fmt_str(s, "Message-ID: <");
  len += i;
  if (s) s += i;
  i = fmt_uint(s, dt.year + 1900);
  len += i;
  if (s) s += i;
  i = fmt_uint0(s, dt.mon + 1, 2);
  len += i;
  if (s) s += i;
  i = fmt_uint0(s, dt.mday, 2);
  len += i;
  if (s) s += i;
  i = fmt_uint0(s, dt.hour, 2);
  len += i;
  if (s) s += i;
  i = fmt_uint0(s, dt.min, 2);
  len += i;
  if (s) s += i;
  i = fmt_uint0(s, dt.sec, 2);
  len += i;
  if (s) s += i;
  i = fmt_str(s, ".");
  len += i;
  if (s) s += i;
  i = fmt_uint(s, getpid());
  len += i;
  if (s) s += i;
  i = fmt_str(s, ".qmail@");
  len += i;
  if (s) s += i;
  i = fmt_strn(s, idhost, idhostlen);
  len += i;
  if (s) s += i;
  i = fmt_str(s, ">\n");
  len += i;
  if (s) s += i;
  return len;
}

int newfield_datemake(datetime_sec when)
{
  if (!stralloc_ready(&newfield_date, datefmt(FMT_LEN, when))) return 0;
  newfield_date.len = datefmt(newfield_date.s, when);
  return 1;
}

int newfield_msgidmake(char *idhost, int idhostlen, datetime_sec when)
{
  if (!stralloc_ready(&newfield_msgid, msgidfmt(FMT_LEN, idhost, idhostlen, when))) return 0;
  newfield_msgid.len = msgidfmt(newfield_msgid.s, idhost, idhostlen, when);
  return 1;
}